A solid insulation T-type wire clamp

Abstract

The invention relates to the technical field of power systems, and particularly relates to a solid-insulated T-type wiring clamp. It includes an outer insulation cover, a sealed housing, a lower insulation housing, and a conductive terminal. The outer insulation cover includes an arched end and a lower connection end. At the intersection of the axis of the lower connection end and the arc axis of the arched end, a wire hanging groove is provided through the lower connection end for hanging and sleeving a wire. The sealed housing includes an arched end and a socket end. The lower insulation housing includes a connection end and a lead end. The sealed housing is sleeved on the outer insulation cover, and the arched ends of the outer insulation cover and the sealed housing are spliced to form a horizontal wire passing hole. This technical solution is used to solve the problems that the contact effect between the T-type wire clamp and the overhead wire is not good during use, resulting in a large resistance at the connection part, and the waterproof and sealing effect is not good, resulting in the internal components being easily corroded, and to meet the insulation restoration requirements in the connection of existing insulated wires.

Description

Technical Field

[0001] The invention relates to the technical field of power systems, and particularly relates to a solid insulation T-type wire clamp. Background Art

[0002] The T-type wire clamp is a fitting for connecting an overhead wire and a branch wire to transfer electrical load. However, the existing T-type wire clamps mainly have the following problems in use: (1) The structural design of the T-type wire clamp is unreasonable, resulting in difficult installation with the overhead wire, and at the same time, the contact effect between the overhead wire and the wire clamp is not good, leading to the problem of excessive resistance at the connection part; (2) The waterproof and sealing effect of the T-type wire clamp is not good, making it easy for external rainwater, moisture, salt spray, etc. to enter its interior, causing corrosion inside the connection part and difficulty in restoring the insulation of the wire. Summary of the Invention

[0003] The purpose of the present invention is to provide a solid insulation T-type wire clamp to solve the problems that the contact effect between the existing T-type wire clamp and the overhead wire in use is not good, resulting in a large resistance at the connection part, and the waterproof and sealing effect is not good, causing easy corrosion of internal components and difficulty in restoring the insulation of the wire.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A solid insulation T-type wire clamp includes an outer insulation hanging cover, a sealing shell, a lower insulation shell, and a conductive terminal. The outer insulation hanging cover includes an arched end and a lower connection end. At the intersection of the axis of the lower connection end and the arc axis of the arched end, a wire hanging groove is provided through the lower connection end for hanging and sleeving the wire. The sealing shell includes an arched end and a socket end. The lower insulation shell includes an upper connection end and a lower lead end. The sealing shell is sleeved on the outer insulation hanging cover, and the arched end of the outer insulation hanging cover and the arched end of the sealing shell are closely spliced to form a horizontal wire passing hole. The upper connection end of the lower insulation shell is threadedly connected to the lower connection end of the outer insulation hanging cover, and the lower insulation shell presses the sealing shell tightly on the outer insulation hanging cover. The socket end of the sealing shell is located outside the upper connection end of the lower insulation shell. The conductive terminal is located inside the lower insulation shell. The conductive terminal is cooperatively connected with the lower connection end of the outer insulation hanging cover. The upper end of the conductive terminal is in close contact with the exposed part of the wire, pressing the wire against the inner wall of the arched end of the outer insulation hanging cover. The lower end of the conductive terminal is detachably connected to the branch wire.

[0006] The working principle is as follows:

[0007] The wire hanging groove on the outer insulation cover passes through the overhead wire and is hung on the overhead wire, making the overhead wire contact with the inner surface of the arched end. Then, the conductive support block is installed on the dovetail groove on the inner side wall of the outer insulation cover. The upper end of the conductive terminal passes through the conductive support block and is threadedly connected to it. By rotating the conductive terminal, the upper end of the conductive terminal will gradually press against the upper overhead wire, applying a pressure to the overhead wire to make the overhead wire and the upper end of the conductive terminal in close contact. Then, the branch wire passes through the waterproof seal joint, the lower lead end of the lower insulation housing, and the socket end of the seal housing, and is firmly connected to the lower end of the conductive terminal. Then, the socket end of the seal housing passes through the lower connection end of the outer insulation cover, aligning the arched end of the seal housing with the arched end of the outer insulation cover, and making the overhead wire located in the horizontal wire passing hole formed by the two. Then, the lower insulation housing is threadedly connected to the outer insulation cover. When connecting, the lower insulation housing will gradually press against the seal housing, thereby applying a pressure to the seal housing. Continuing to apply force, the wire sealing gasket is compressed, so that the horizontal wire passing hole formed by the arched end of the outer insulation cover and the arched end of the seal housing tightly wraps the wire. Then, the waterproof seal joint is connected and tightened with the lower lead end of the lower insulation housing, thus completing the wiring operation and insulation sealing for taking out the branch wire from the overhead wire.

[0008] Further defined, an installation hole is provided in the wire hanging groove of the outer insulation cover, and a conductive support block is clamped in the installation hole. The conductive support block is in threaded cooperation with the conductive terminal. The advantage is that the setting of the conductive support block can play a role in positioning the conductive terminal, preventing the conductive terminal from tilting. At the same time, by adopting the method of setting a V-shaped protrusion on the conductive support block and a dovetail groove on the outer insulation cover, the two are in full contact under the stressed state, which not only increases the current-carrying contact surface, but also the conductive support block restricts the problem of excessive deformation of the lower connection end of the outer insulation cover, making the contact more reliable.

[0009] Another implementation manner of the present invention is also provided. The upper end of the conductive terminal is threadedly connected to the inner side surface of the outer insulation cover. The advantage is that the upper end of the conductive terminal is made larger, and the upper end of the conductive terminal and the inner side surface of the lower connection end of the outer insulation cover are connected by means of threaded connection, making the structure simpler. At the same time, due to the large area of the upper end, it is not easy to damage the wire when in close contact with the overhead line, and the conductive effect is good, and it is more rapid to install on the overhead line.

[0010] Further defined, a hole for accommodating the branch wire is provided at the lower end of the conductive terminal, and a threaded fastener is provided through the side wall of the hole. The advantage is that one end of the branch wire is inserted into the lower part of the conductive terminal, and then the branch wire is fixed on the conductive terminal through the connection of the bolt and the connection hole. Such a connection method is simple and the connection is tight enough.

[0011] Further limitation: a force-receiving surface or hole facilitating the application of force by a fastening tool during the installation of the conductive terminal is provided on the conductive terminal, and a round head is provided at the upper end of the conductive terminal. The advantage is that during installation, the round head is not likely to damage the overhead conductor when contacting it, and it increases the contact area for current conduction with the conductor.

[0012] Further limitation: a number of tooth-shaped protrusions are provided on the inner side of the arched end of the outer insulating cover and / or on the conductive metal body provided inside the arched end. The advantage is that the tooth-shaped protrusions can easily break the oxide layer on the overhead conductor under the action of pressure, that is, it better ensures the effective contact between the wire clamp and the connected conductor.

[0013] Further limitation: an inverted U-shaped groove corresponding to the conductive terminal is provided on the inner side of the arched end of the outer insulating cover and / or on the metal body provided inside the arched end. The advantage is that since the overhead conductor will produce a slight upward protrusion deformation under the pressure of the conductive terminal, the inverted U-shaped design enables the overhead conductor and the arched end of the outer insulating cover to fit better, increasing the contact area and reducing the contact resistance.

[0014] Further limitation: wire sealing gaskets are respectively provided on the contact surfaces of the arched side of the outer insulating cover of the lateral wire passing hole and the arched side of the sealing housing, and a waterproof sealing joint is provided at the lower lead end of the lower insulating housing.

[0015] Further limitation: conductive metal bodies in contact with each other are provided on the inner side of the arched end and the inner side of the lower connection end of the outer insulating cover. The advantage is that the provision of the conductive metal bodies increases the contact area with the conductor, enabling the current on the conductor to be conducted through the conductive metal bodies to the conductive terminal and then transmitted to the branch conductor, increasing the current-carrying area.

[0016] Further limitation: regarding another upper end of the conductive terminal, an arc-shaped wire supporting plate is provided at the upper end of the conductive terminal, the upper end of the conductive terminal is rotatably connected to the arc-shaped wire supporting plate, and an arc-shaped groove consistent with the length direction of the wire is provided on the upper surface of the arc-shaped wire supporting plate. The advantage is that by providing an arc-shaped wire supporting plate that conforms to the shape of the overhead conductor, the acting force of the conductive terminal acts on the arc-shaped wire supporting plate, and the arc-shaped wire supporting plate provides a tightening force to the overhead wire, increasing the contact area between the conductive terminal and the overhead conductor. At the same time, it avoids the problem that the conductive terminal directly abuts against the overhead wire, resulting in the overhead wire becoming loose and broken.

[0017] The technical effects of the present invention are as follows:

[0018] (1) All components in the present invention adopt an integral injection molding process, and the installation method between them and the overhead conductor is simple. The full-insulation sealed connection between the wire clamp and the conductor is completed through a wire sealing gasket and a waterproof sealed joint. (2) After being compressed, the overhead conductor has an inverted U-shaped structure, and its inherent elastic function can continuously and constantly maintain the pressure on the conductor, improving the contact and conduction effects. Through the combination of the conductive metal body, conductive support block, and conductive terminal arranged inside the outer insulation cover, the conductor has the largest contact area, ensuring the reliability of connection and current conduction. (3) The upper end of the conductive terminal is spherical, which can effectively avoid damaging the conductor and ensure the largest contact surface between the conductive terminal and the conductor. (4) There are tooth-shaped protrusions at the contact part between the outer insulation cover and the conductor, which can break the oxide layer of the conductor, better ensuring the effective contact between the wire clamp and the connected conductor. (5) By setting a wire sealing gasket and a waterproof sealed joint, the present T-shaped wire clamp can prevent wind, rain, moisture, salt spray, etc. in the environment from entering its interior, that is, the internal conductor will not be corroded, effectively improving the service life of the wire clamp and enhancing the reliability of the connection. (6) After wiring, since the cable is located inside the outer insulation cover, sealed housing, and lower insulation housing, there is no need to restore the insulation of the peeled bare cable. Description of the Drawings

[0019] Figure 1 Schematic diagram of the external shape of a solid insulation T-shaped wire clamp according to the present invention;

[0020] Figure 2 Schematic cross-sectional view of Embodiment 1 of a solid insulation T-shaped wire clamp according to the present invention;

[0021] Figure 3 Schematic cross-sectional view of the conductive terminal provided with an arc-shaped wire support plate in Embodiment 1 of a solid insulation T-shaped wire clamp according to the present invention;

[0022] Figure 4 Schematic diagram of the end of the conductive terminal being round-headed in Embodiment 1;

[0023] Figure 5 Schematic cross-sectional view of the end of the conductive terminal being round-headed in Embodiment 1;

[0024] Figure 6 Schematic cross-sectional view of the end of the conductive terminal provided with an arc-shaped wire support plate in Embodiment 1;

[0025] Figure 7 Schematic cross-sectional view of Embodiment 2;

[0026] Figure 8 Schematic cross-sectional view of the wire terminal in Embodiment 2;

[0027] Figure 9 Schematic front view of the outer insulation cover;

[0028] Figure 10 Schematic side view of the external insulation hanging cover;

[0029] Figure 11 Schematic top view of the conductive support block;

[0030] Figure 12 Schematic front view of the conductive support block;

[0031] Figure 13 Schematic external shape of the lower insulation housing;

[0032] Figure 14 Schematic side view of the wire gasket;

[0033] Figure 15 Schematic front view of the wire gasket.

[0034] Drawing reference numerals

[0035] External insulation hanging cover 1, wire gasket 2, sealed housing 3, lower insulation housing 4, conductive support block 5, conductive terminal 6, fastening bolt 7, waterproof sealed joint 8, arc-shaped wire support plate 9, rotating shaft 10. Detailed description of the specific implementation

[0036] The following is a further detailed description through specific implementation manners:

[0037] Example 1

[0038] As Figures 1-15 shown, this example provides a solid insulation T-type wire clamp, which is composed of an integrally injection-molded external insulation hanging cover 1, sealed housing 3, lower insulation housing 4 and conductive terminal 6. The wire gasket 2 is embedded on the external insulation hanging cover 1 and the sealed housing 3. Driven by the rotation of the lower insulation housing 4, the two wire gaskets 2 are closely attached and deformed under pressure, filling and sealing the tiny gap between the horizontal wire passing hole and the wire, realizing the full-insulation sealing of the overhead wire connection.

[0039] The outer insulation hanging cover 1 includes an arched end and a lower connection end. A wire hanging groove penetrating through the lower connection end is provided on the central plane where the lower connection end coincides with the axis of the arched end. The sealed housing 3 includes an arched lower end and a socket end. The lower insulation housing 4 includes an upper connection end and a lower lead end. The sealed housing 3 is sleeved on the outer insulation hanging cover 1, so that the arched end of the sealed housing and the arched end of the outer insulation hanging cover are spliced to form a horizontal wire passing hole. The upper connection end of the lower insulation housing 4 is threadedly connected to the lower connection end of the outer insulation hanging cover 1. And a boss is provided on the inner surface of the socket end of the sealed housing 3. By contacting the upper surface of the upper connection end of the lower insulation housing 4 with the boss, the sliding limit of the sealed housing 3 is realized. Such a limiting method is relatively simple. The socket end of the sealed housing 3 is located outside the upper connection end of the lower insulation housing 4. The lower end of the conductive terminal 6 is detachably connected to the branch wire. The conductive terminal 6 is located inside the lower insulation housing. In this specific embodiment, the lower lead end of the lower insulation housing limits the lower end section of the conductive terminal 6. Wire sealing gaskets 2 are provided at both ends of the horizontal wire passing hole. Of course, sealing methods such as sealing gaskets, sealants or silicone layers can also be used. The setting method of the wire sealing gasket 2 is specifically that annular grooves are provided on the inner side surface of the arched end of the sealed housing 3 and the inner side surface of the arched end of the outer insulation hanging cover 1, and the wire sealing gasket 2 is clamped in the grooves. A waterproof sealing joint 8 is provided at the end of the lower lead end of the lower insulation housing.

[0040] Preferably, the lower connection end of the outer insulation cover 1 is provided with a mounting hole, which is threaded through the outer insulation cover 1. A conductive support block 5 is provided in the mounting hole and is snap-fitted thereto. Dovetail grooves are symmetrically provided on the side wall of the mounting hole, and a V-shaped protrusion matching the dovetail groove is provided on the conductive support block 5. The conductive support block 5 is threadedly connected to the conductive terminal 6. The setting of the conductive support block 5 can position the conductive terminal 6 so that the conductive terminal 6 does not tilt. At the same time, the V-shaped protrusion on the conductive support block 5 is in full contact with the dovetail groove on the outer insulation cover 1 under the stress state, which not only ensures a sufficient current-carrying contact surface but also limits the problem of excessive deformation of the outer insulation cover 1, making the contact more reliable. A number of longitudinal through notches are provided on the lower connection end of the outer insulation cover 1. Notching the periphery can reduce the weight, save raw materials, and reduce costs. A number of tooth-shaped protrusions are provided in the middle of the inner side of the arched end of the outer insulation cover 1. The tooth-shaped protrusions can easily break the oxide layer on the overhead wire under the action of pressure, which better ensures the effective contact between the wire clamp and the connected wire. The axial cross-sectional shape of the inner side of the arched end of the outer insulation cover 1 is an inverted U shape, or an inverted U-shaped groove is provided in the conductive metal body provided therein, because the overhead wire will produce a slight upward protrusion deformation under the pressure of the conductive terminal 6. Therefore, the inverted U-shaped design enables the overhead wire and the arched end of the outer insulation cover 1 to fit better, thus reducing the contact resistance. In this specific embodiment, an arc-shaped wire support plate 9 is provided at the upper end of the conductive terminal 6 and is rotatably connected to a rotating shaft 10 above the conductive terminal 6 at the lower part. The arc-shaped wire support plate 9 contacts the exposed lower part of the overhead wire, changing the point contact between the conductive terminal 6 and the overhead wire into a line contact, which can increase the conductive area and improve the conductive effect; a round head can also be provided at the upper end of the conductive terminal 6. The round head contact is not easy to damage the overhead wire and increases the contact area for current flow between it and the wire.

[0041] Preferably, in this embodiment, the detachable connection method and structure between the conductive terminal 6 and the branch wire are specifically as follows: the lower part of the conductive terminal 6 is a hollow cylinder, and at least two connection holes are provided in its axial direction. The inner wall of the connection hole is provided with a connection thread. One end of the branch wire is inserted into the lower part of the conductive terminal 6, and then the branch wire is fixed to the conductive terminal 6 through the connection of the fastening bolt 7 and the connection hole. Such a connection method is simple and the connection is tight enough.

[0042] Preferably, the outer insulation hanging cover 1, the conductive support block 5, and the conductive terminal 6 are made of special aluminum alloy materials with high strength and high conductivity, and the wire gasket 2 is made of weather-resistant silicone rubber. A protective housing is provided on the outer surface of the outer insulation hanging cover 1 to prevent corrosion and oxidation by external factors. In this specific embodiment, the outside of the solid insulation T-type wire clamp is a fully plastic structure. Through the up-and-down combination of the gasket and the waterproof sealing joint 8, the product is completely sealed and insulated, so that the internal conductor structure will not be corroded by wind, rain, moisture, salt spray, etc., extending the service life of the wire clamp. At the same time, it reduces the possibility of short circuits between phases caused by external electric shock and falling objects, improving the safety and reliability of power transmission.

[0043] Preferably, conductive metal bodies that are in contact with each other are provided on the inner sides of the arched end and the lower connection end of the outer insulation hanging cover 1. The arrangement of the conductor metal bodies increases the contact area with the wire, enabling the current on the wire to be conducted through the conductive metal bodies to the conductive terminal 6 and then transmitted to the branch wire, increasing the current transmission path.

[0044] Embodiment 2

[0045] The difference between Embodiment 2 and Embodiment 1 lies in the installation method of the conductive terminal 6. Specifically in Embodiment 2, the upper end of the conductive terminal 6 is made larger, and the upper end of the conductive terminal 6 is threadedly connected to the inner side surface of the outer insulation hanging cover 1. Of course, it can also be a threaded connection between the conductive terminal 6 and the threaded holes provided on the end surface of the lower end of the outer insulation hanging cover 1. The advantage is that the threaded connection between the upper end of the conductive terminal 6 and the inner side surface of the outer insulation hanging cover 1 makes the structure simpler. At the same time, due to the large area of the upper end, it is not easy to damage the wire when in close contact with the overhead line, and the conductive effect is good, and it is faster to install on the overhead line. Preferably, an arc-shaped wire support plate 9 can also be provided at the upper end of the conductive terminal 6. The upper end of the conductive terminal 6 is rotatably connected to the arc-shaped wire support plate 9, and an arc-shaped groove consistent with the length direction of the wire is provided on the upper surface of the arc-shaped wire support plate 9. The advantage is that since the volume of the upper end of the conductive terminal 6 is small, it is easy to disperse the overhead line when abutting against the overhead line. By providing the arc-shaped wire support plate 9, the acting force of the conductive terminal 6 acts on the arc-shaped wire support plate 9, and the arc-shaped wire support plate 9 provides a tightening force to the overhead line. Since the shapes of the arc-shaped wire support plate 9 and the overhead line match, it is not easy to damage the wire and can also increase the conductive area.

[0046] It should be noted in advance that in the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The above are only embodiments of the present invention, and common knowledge such as specific structures and characteristics known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope claimed in this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A solid-insulated T-type terminal clamp, characterized in that, It includes an outer insulation hanging cover, a sealed housing, a lower insulation housing, and a conductive terminal. The outer insulation hanging cover includes an arched end and a lower connecting end. At the intersection of the axis of the lower connecting end and the arc axis of the arched end, a wire hanging groove is provided through the lower connecting end for hanging and sleeving a wire. The sealed housing includes an arched end and a socket end. The lower insulation housing includes an upper connecting end and a lower lead end. The sealed housing is sleeved on the outer insulation hanging cover, and the arched ends of the outer insulation hanging cover and the sealed housing are tightly spliced to form a horizontal wire passing hole. The upper connecting end of the lower insulation housing is threadedly connected to the lower connecting end of the outer insulation hanging cover, and the lower insulation housing presses the sealed housing tightly against the outer insulation hanging cover. The socket end of the sealed housing is located outside the upper connecting end of the lower insulation housing. The conductive terminal is located inside the lower insulation housing. The conductive terminal is cooperatively connected with the lower connecting end of the outer insulation hanging cover. The upper end of the conductive terminal is in close contact with the exposed part of the wire, pressing the wire against the inner wall of the arched end of the outer insulation hanging cover. The lower end of the conductive terminal is detachably connected to a branch wire.

2. The solid insulation T-type terminal clamp according to claim 1, wherein, Conductive metal bodies in contact with each other are provided on the inner side of the arched end and the inner side of the lower connecting end of the outer insulation hanging cover.

3. The solid insulation T-type terminal clamp according to claim 2, characterized in that, A number of tooth-shaped protrusions are provided on the conductive metal body provided on the inner side and / or inside the arched end of the arched end of the outer insulation hanging cover.

4. The solid insulation T-type wire clamp according to claim 2, characterized in that An inverted U-shaped groove corresponding to the conductive terminal is provided on the conductive metal body provided on the inner side of the arched end of the outer insulation hanging cover.

5. A solid insulation T-type connection clamp according to claim 1, characterized in that, The conductive terminal is provided with a force-bearing surface or hole for facilitating the application of force by a fastening tool during the installation of the conductive terminal, and the upper end of the conductive terminal is provided with a round head.

6. The solid insulation T-type wire clamp according to claim 1, characterized in that, The lower end of the conductive terminal is provided with a hole for accommodating a branch wire, and a threaded fastener is provided through the side wall of the hole.

7. The solid insulation T-type wiring clamp according to claim 1, characterized in that, Wire sealing gaskets are respectively provided on the contact surfaces of the arched side of the outer insulation hanging cover and the arched side of the sealed housing of the horizontal wire passing hole, and a waterproof sealing joint is provided at the lower lead end of the lower insulation housing.

8. A solid insulation T-type terminal clamp according to claim 1, characterized in that, The upper end of the conductive terminal is provided with an arc-shaped wire supporting plate. The top of the upper end of the conductive terminal is rotatably connected to the arc-shaped wire supporting plate. A number of tooth-shaped protrusions are provided on the wire pressing side surface of the arc-shaped wire supporting plate.

9. The solid insulation T-type wiring clamp according to claim 2, characterized in that An installation hole is provided in the wire hanging groove of the outer insulation hanging cover. A conductive support block is clamped in the installation hole. The conductive support block is in threaded cooperation with the conductive terminal. Dovetail grooves are symmetrically provided on the side wall of the installation hole, and a V-shaped protrusion matching the dovetail groove is provided on the conductive support block.

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